Anaconda基础环境启动Jupyter报错（含完整回溯信息）

报错核心信息 #

Traceback (most recent call last):
File "C:\Users\neall\anaconda3\Lib\site-packages\notebook\traittypes.py", line 235, in _resolve_classes
klass = self._resolve_string(klass)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\traitlets\traitlets.py", line 2015, in _resolve_string
return import_item(string)
^^^^^^^^^^^^^^^^^^^
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\traitlets\utils\importstring.py", line 33, in import_item
module = __import__(package, fromlist=[obj])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ModuleNotFoundError: No module named 'jupyter_server.contents'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\neall\anaconda3\Scripts\jupyter-notebook-script.py", line 10, in 
sys.exit(main())
^^^^^^
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\jupyter_core\application.py", line 283, in launch_instance
super().launch_instance(argv=argv, **kwargs)
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\traitlets\config\application.py", line 1073, in launch_instance
app = cls.instance(**kwargs)
^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\traitlets\config\configurable.py", line 583, in instance
inst = cls(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\traitlets\traitlets.py", line 1292, in __new__
inst.setup_instance(*args, **kwargs)
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\traitlets\traitlets.py", line 1335, in setup_instance
super(HasTraits, self).setup_instance(*args, **kwargs)
File "C:\Users\neall\AppData\Roaming\Python\Python311\site-packages\traitlets\traitlets.py", line 1311, in setup_instance
init(self)
File "C:\Users\neall\anaconda3\Lib\site-packages\notebook\traittypes.py", line 226, in instance_init
self._resolve_classes()
File "C:\Users\neall\anaconda3\Lib\site-packages\notebook\traittypes.py", line 238, in _resolve_classes
warn(f"{klass} is not importable. Is it installed?", ImportWarning)
TypeError: warn() missing 1 required keyword-only argument: 'stacklevel'

用户已尝试操作 #

• 卸载并重新安装Anaconda
• 删除本地电脑上所有Jupyter文件及相关信息
• 重启电脑

解决方案 #

1. 清理全局Python包目录的冲突文件 #

报错路径显示全局Python（C:\Users\neall\AppData\Roaming\Python\Python311\site-packages）下的traitlets等包与Anaconda自带包版本冲突，导致参数不兼容：

• 打开文件管理器，进入C:\Users\neall\AppData\Roaming\Python\Python311\site-packages
• 删除所有包含traitlets、jupyter_core、jupyter_server的文件夹

2. 重新安装Anaconda基础环境的Jupyter依赖 #

打开Anaconda Prompt，执行以下命令：

conda activate base
conda uninstall -y notebook traitlets jupyter_core jupyter_server
conda install -y notebook traitlets jupyter_core jupyter_server

3. 调整环境变量优先级 #

确保Anaconda的路径优先于全局Python路径，避免包调用冲突：

• 右键「此电脑」→「属性」→「高级系统设置」→「环境变量」
• 在系统变量的Path列表中，将Anaconda的Scripts（如C:\Users\neall\anaconda3\Scripts）和Library\bin路径移至最上方

4. 验证启动 #

在Anaconda Prompt中执行jupyter notebook，检查是否能正常启动GUI界面。

内容的提问来源于stack exchange，提问作者neal301